.head{
    width: 100%;
    height: 100px;
    /* background-color: pink; */
}
.head .head-c{
    width: 1200px;
    height: 100%;
    /* background-color: rgb(0, 162, 255); */
    margin: 0 auto;
}
.head .head-c .logo{
    float: left;
    margin-top: 20px;
}
.head .head-c .nav{
    float: right;
}
.head .head-c .nav .nav-item{
    float: left;
    width: 36px;
    line-height: 100px;
    margin-left: 82px;
    text-align: center;
}
.head .head-c .nav .nav-item a{
    font-size: 14px;
}
.head .head-c .nav .nav-item:hover a{
    font-size: 18px;
    color: #668aca;
}
.head .head-c .nav .nav-item .line{
    display: block;
    width: 20px;
    height: 1px;
    background-color: #668aca;
    margin: -35px auto 0;
    opacity: 0;
}
.head .head-c .nav .nav-item:hover .line{
    opacity: 1;
}
.head .head-c .nav .nav-item.active a{
    font-size: 18px;
    color: #668aca;
}
.head .head-c .nav .nav-item.active .line{
    opacity: 1;
}
